Spraying device for leather-working machinery.



J. ELDERKIN & F, ROSE. SPRAYING DEVICE FOR LEATHER WORKING MACHINERY.

Patented Spt. 27, 1910.

APPLICATION FILED JUNE 23, 1909.

2 SHEETB-SHEET 1.

Patented Sept. 27,1910.

APPLICATION FILED JUNE 23, 190B.

2 SHBETB-SHEBT 2.

pnrrn ears SPRAYING DEVICE FOR LEATHER-WORKING MACHINERY.

erases.

Specification of Letters Patent.

Patented Sept. 27, 191%.

Application filed June 23, 1909. Serial No. 503,800.

To all whom it may concern:

Be it known that we, JOHN ELDERKIN and F RED ROSE, bot-h citizens of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Spraying Device for Leather-Working Machinery, of which the following is a specification.

The purpose of our invention is to apply water or other required fluid hereinafter for convenience called water, under pressure and preferably in the form of a spray in leather working operations, illustrated as applied to the sewing operation. upon leather in the McKay machine.

A further purpose of our invention is to direct a spray immediately upon the leather to be operated upon and in but slight advance of said operation by attachment of the nozzle therefor to one of the operating parts.

A further purpose of our invention is to make the presser foot of a McKay machine effective to carry a nozzle for applying spray to the leather and keeping the nozzle free from obstruction.

A further purpose of our invention is to provide valve operating mechanism and valves for the control of the water and mix ture of air and water to the reatest advantage, obtaining movement of the valves in coincidence with operation of the machine preferably one in advance of the other, with the operation of the leather working machinery and delicate means of adjustment and accurate resetting after stoppage by means of a hand valve.

It further consists of other novel details of construction all as will be hereinafter fully set forth.

For the purpose of illustrating our invention, we have shown in the accompanying drawings one form thereof which is at present preferred by us, since the same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which our invention consists can be variously arranged and organized and that our invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Figure 1 is a broken side elevation of a structure embodying our invention. Fig. 2 is a longitudinal section of the tank supplying the fluid for use in our invention. Fig. 3 represents an elevation of a portion of the structure shown in Fig. 2. Figs. 4 and 5 are broken elevations at right angles to each other of a portion of the structure shown in Fig. 2. Fig. 6 is a detail vertical section of a valve shown in Fig. 2. Fig. 7 represents a transverse section of pipes and a coupling shown in Fig. 1. Fig. 8 represents a longitudinal section of a portion of a presser foot showing a modification.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings :-1 designates the needle bar and '2 the needle of an ordinary McKay machine having the usual presser foot 8, guide 4, links 5 and (3, levers 7 and 8 and spring control by means of springs 9, 1O andll, the latter being connected by yoke 12. These parts are mounted upon the frame 13 supported by brackets lt. We have nalso illustrated the conventional horn 15 but have omitted the mechanism for feeding waxed thread thereto, all of which is well known and common in the art.

Ne prefer to make no change in this machine itself nor in any machine to which our invention may be applied, but to use it complete, including the foot lever 16 by which it is operated and to apply our forced feed to it by setting up the mechanism therefor in proximity to the machine, in attaching the nozzle 17 of our feed to the pin 18 or other part of the presser foot or corresponding appropriate part by any suitable means as by con ling 19 and to place the operating lever 20 or turning on the spray feed under the starting lever 16 in such position that the operation of the machine will entail the operation of our forced feed but that the lever 20 may be pressed at some intermediate point such as 21 to operate the forced feed independently of the operation of the machine when desired, either to increase the amountor change the distribution of the fluid fed upon the work or to clear the aperture of the nozzle in case of cloggirigI Carrying out this idea of keeping our apparatus preferably separate from the machine we prefer to mount our tank 22 in which the fluid to be fed is kept upon a stand 23.

The top 24 of the stand is preferably provided with a socket for reception of the pin 25 upon the lower part of the tank 22 and we have shown threads at 26 for a nut 26 though other means of attachment could be used. \Ve prefer to extend the top at 27 to provide suoport for a frame 28 through which the flow of the fluid is controlled and we show one form of support of this frame therein by means of a screw 29 upon the frame passing through an aperture 30 in the top and held in place therebelow by a nut 31. In the form shown the frame carries a valve 32 and valve rod 33 controlling passage between pipe 34 and pipe 35, these pipes preferably being out of line, thus providing a more extended valve chamber than could readily otherwise be secured. e recognize, however, that many other forms of valve would serve our purpose. The end 36 forms a guide for each of two rods 37, 38 which carry bar 39 at their upper ends, secured by suitable nut 40, and bar 41 at their lower end secured by nuts 42. This lower bar is also provided with a socket 43 for the preferably screwed end of rod 44 which is connected at 45 with the reverse end of foot lever 20 which latter is pivoted at 46. Pressing this lever downwardly therefore results in movement of the rod 44 and of the frame 28 including its rods 37 and 38 upwardly, which upward movement is at all t mes opposed by springs 47 and 48.

The springs 47 as illustrated differ from the springs 43 in that the former act by compression and'the latter bydistention and that the springs 47 are initially and preferably fixed while'the springs 48 in so far as they affect the frame 28 are capable of adjustment with respect thereto by means of nuts 49 and 50 upon opposite sides of the bar 51 carrying valve stem 33. While these springs 48 evidently affect this bar and valve v stem at all times they do not become effective in opposition to movement of the frame until the nuts 49 upon rods 37 and 38 engage with the bar 51. The nuts 50 limit the distention of the springs 47 and the spacing between nuts 49 and 50-permits of partial movement of the lever 20 without operation of the valve which spacing permits earlier operation of another valve to be described and can be varied to suit the requirements of the machine and wish of the operator.

The bar 39 constitutes not only spacing and uniting means for the rods 37 and 38 but preferably connects these rods with and constitutes the end of a lever 52 pivoted at 53 and used for the purpose of operating an additional valve 54 by means of valve rod 55 working through gland 56 for the purpose of controlling the supply of water from the tank 22 into the pipe 34. The tank 22 is preferably itself made up of a base 57 to which the connection 25 is united and provided with passages 58 and 59 for attachment of pipes 34 and 60, passage 61 uniting passages 58 and 59 and passage 62 within which valve 63 operates and into which valve 54 is set. This base is provided with a flange 64 within which rests preferably glass body 65 most desirably of cylindrical form and upon the top of this body rests cap 66 carrying ears 67 for pivot 53. The top and base are united by anysuitable means as by rod 68 and the space between the glass body and the top and bottom is preferably gasketed with rubber or other suitable material at 69 and 70. From the passage 59, within which air under pressure is to be supplied, we run a pipe 71 up into the upper part of the water tank so that air under pressure is thus supplied above the water in the tank.

The tapered valve stem 63 is supported in the base at? 2 and is spring-pressed inwardly by spring 73 operating upon nut 74. Thisvalve stem is provided with a thumb piece at 75 by which it can be turned and we 'prefer to attach to it at any suitablepoint, an adjustable stop by Which it can be set to increase or diminish the flow of water and reset to secure the precise previous position at any time after the water has been cut off completely. By the same means, therefore, we obtain a nice adjustment of the amount of opening in this valve and insure return thereto. In the form illustrated we provide this stop here circumferential becausethe movement of the valve is rotary, and adjustment by means of a collar 7 6 held by set screws 77 and carrying lug 78 within which knurled screw 79 is threaded, this screw being locked or jammed in position by knurled nut 80. The screw 79 engages any suitable lug 81 or other fixed part. We thus provide three valves for our tank, of which one is hand operated and screw set and adjusted and operates upon the water alone, the other two being coincident with the operation of the machine or capable of independent operation, both operating together but capable ofadjustment relatively to each other as to their time of operation by means of the nuts connecting them with the frame and lever respectively and one operative upon the water alone whilethe other operates upon the combined air and water which we prefer to supply by our apparatus. In addition to these three valves we supply a separate valve 82 for thenontrol of the air supply by means of pipes 83 connected with any suitable air compressor tank 84.

In operation plug 85 is removed and the tank filled with water to the desired height. The valves operated by the foot lever are,

adjusted to open the required distance and in the requiredorder and at the proper pointi in the operation of the machine. The hand. valve is set to deliver the preferred quantity This air; not only forces the water out from the tank of water and the air is turned on.

and connections between the parts might be used to attain the same advantages of variatlon of the time and extent of operation of the valves, that other means of forming and mixing the air and water pressures might be supplied, and that different specific mechanism'for all of the functions set out by us might be made use of while obtaining some if not all of the advantage of our invention.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is

1. In a device of the character described, means for maintaining air under pressure, a water tank, means for conducting air pressure to the water tank and introducing it above the water, a valve controllingthe Water, a valve for mixing the air and the water under air pressure, common means for properly operating the two valves, and a nozzle supported adjacent the presser foot and connected with said mixture of air and water to deliver spray to the material being operated on.,

2. In a device of the character described, a nozzle, a water tank, means for exerting air pressure upon the surface of the water and making air under pressure available exterior to and in proximity to the tank, two valves controlling the water under air pressure and the mixture of air and water formed by admission of water to the point of air pressure availability, a connection between the second valve and the nozzle, and common means for operating the two valves together.

3. In a spraying device, a water tank having means for applying air pressure to the surface thereof and an a1r passage in proximity thereto, a valve in said tank controlling admission of water under pressure to said passage, a lever controlling the movement of said valve, a second valve controlling the flow of the mixed air and water, and means connected with the lever and with the stem of the second valve permitting partial movement of the first valve stem Without movement of the second valve stem and causing movement of the second valve stem with continued movement of the first.

4:. In a spraying device for leather work, a water tank provided with a passage therefrom and with a communicatingpassage for air under pressure, a valve each for the water and for the mixed water and air, said valves having common operating means, means for actuating said valves one in advance of the other and an auxiliary hand valve for said water.

5. In a spraying device for leather, the

combination with a leather working machine, of a water tank having a passage therefrom and a passage communicating therewith for air under pressure, a valve for the water passage, operating means for said valve set in motion by the starting of the machine, a valve for controlling the passage of the air, means for actuating said valves, one in advance of the other, an auxiliary hand valve for said water, and adjustable stop means for determining the amount of opening of said valve. i

6. In a spraying device for leather working machinery, a water tank having a water outlet passage and communicating air pressure passage for mixture of the air and water, valves controlling the water and mixed air and Water supplies respectively, common operating means for said valves, a spring interposed between the operating means and the valves for the water, and an additional spring interposed along with the first spring between the operating means and the valve for the mixed air and water.

7. In a spraying device for use with leather working machinery, receptacles forair and water under pressure means for mixing air and water under pressure, a valve controlling the supply of the mixed air and water, a valve stem for said valve, a lever and rod for operating the valve stem, a spring for permitting retarded-partial movement of the lever and rod before operation of the stem, and an additional spring for resisting the movement of said valve stem. 8. In" a spraying device for use with leather working machinery, receptacles for air and water under pressure means for mixing air and water under pressure. a valve and stem controlling the water supply thereof, a valve and stem controlling the supply of mixed air and water, a lever and rod for operating both valve stems, a spring for permitting retarded partial movement of the lever and rodoperation of the second valve stem, and a spring serving as an adand rod for operating both valve stems, dltional retardation to the operation of the and a spring for permitting spring retarded,

second valve stem. partial movement of the lever and rod be- 1 9.h In a lsnpfi'aying hdevice for use with fore operation, of the second valve stem.

5 eat er wor g mac inery, rece tacles, for

air and water under pressure rileans for RKIN' mixing air and water under pressure, a valve and stem controlling the water sup- Witnesses: ply thereof, a valve and stem controlling W. S. JACKSON,

10 the supply of mixed air and water, a lever C. D. MCVAY. 

